Yup, its called acting. Couldn't give you a specific state as I'm not from the area, but I think its a stereotypical/generic accent of people living in the Appalachian/Smokey Mountains of the Southern States of the US.

Hi Kiddo. I am from England but now live in the US. Having spent 6 months in Alabama (southern state in America) It is very easy to pick the accent up! Spike Jonze was great in Three Kings, voice and all You're from Austria! I spent many a happy holiday skiing there